1. Thermally emitting isolated neutron stars
Constraints of the compactness of the isolated neutron stars via -ray phase-resolved spectroscopy
Valeri Hambaryan 1, Valery Suleimanov 2, Ralph Neuhäuser 1 & Klaus Werner 2
1Astrophysical Institut , University of Jena, Germany
2Institut for Astronomy & Astrophyscs , University of Tuebingen, Germany
1Astrophysical Institut , University of Jena, Germany
RBS 1223=1RXS J
High galactic latitude: l= b=
Highest pulsed fraction among M7:
Double humped light curve Strongest broad absorption feature
EW = 150 eV
E line = 300 eV
Thermally emitting isolated neutron stars
P-P_dot diagram Distribution in Galaxy 1

2. Observational data: Spectrum vs LC
Model:
Fe cyclotron
energy EC
Condensed Fe surface
spectra approximations
Partially ionized H atmospheres above
condenced Fe surfaces